<main class="st-body">
  <!--left-->
  <aside class="st-menu">
    <app-sidebar [data]="menu"></app-sidebar>
  </aside>
  <!--left-->
  <!-- right-->
  <article class="st-content">
    <!--    <header class="st-header">123</header>-->
    <app-header></app-header>
    <section class="st-main">
      <router-outlet></router-outlet>
    </section>
    <footer class="st-footer"></footer>
  </article>
  <!-- right-->
</main>
